Optical trial frame



FIG. 1 is a front plan view of an optical trial frame embodying our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front perspective view thereof; and,

FIG. 6 is a rear perspective view thereof.

In a preferred embodiment, the nature of this product is an optical trial frame suitable for retinoscopy or refraction tests on the eye. 

CLAIM The ornamental design for an optical trial frame, as shown and described. 